Omit the results evaluated at assignment if they are too long.
The behavior of ECHO_ON_ASSIGNMENT being on by default is hard to understand,
so I change it to off by default. Instead, we turn OMIT_ON_ASSIGNMENT on by
default. The result is displayed on assignment, but it will always be short
and within one line of the screen.
https://github.com/ruby/irb/commit/c5ea79d5ce
SecureRandom lazily defines `get_random`. Accessing the mutex to define
the `get_random` method is not supported inside a Ractor. This commit
defines `gen_random` when `securerandom` is required and makes it
suppore Ractor (as well as thread safe).
Here is a test program:
```ruby
require "securerandom"
r = Ractor.new do
loop do
Ractor.yield SecureRandom.hex
end
end
p r.take
```
Before this commit:
```
$ make runruby
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems ./test.rb
<internal:ractor>:38: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
/Users/aaron/git/ruby/lib/securerandom.rb:94:in `gen_random': can not access instance variables of classes/modules from non-main Ractors (RuntimeError)
<internal:ractor>:124:in `take': thrown by remote Ractor. (Ractor::RemoteError)
from ./test.rb:9:in `<main>'
/Users/aaron/git/ruby/lib/securerandom.rb:94:in `gen_random': can not access instance variables of classes/modules from non-main Ractors (RuntimeError)
from /Users/aaron/git/ruby/lib/securerandom.rb:155:in `random_bytes'
from /Users/aaron/git/ruby/lib/securerandom.rb:176:in `hex'
from ./test.rb:5:in `block (2 levels) in <main>'
from ./test.rb:4:in `loop'
from ./test.rb:4:in `block in <main>'
make: *** [runruby] Error
```
After this commit:
```
$ make runruby
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems ./test.rb
<internal:ractor>:38: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
"3fc8885157e3911bab4b5d7619bb0308"
```
This is useful to see what a block of code allocated, e.g.
```
GC.start
GC.disable
ObjectSpace.trace_object_allocations do
# run some code
end
gc_gen = GC.count
allocations = ObjectSpace.dump_all(output: :file, since: gc_gen)
GC.enable
GC.start
retentions = ObjectSpace.dump_all(output: :file, since: gc_gen)
```
git
aycabta
Kazuhiro NISHIYAMA
Masaki Matsushita
Yoshinao Muramatu
Hiroshi SHIBATA
Soutaro Matsumoto
Nobuyoshi Nakada
Matt Valentine-House
Koichi Sasada
Aaron Patterson
Jean Boussier
Jeremy Evans
Takashi Kokubun